Pulverized fuel furnace



Jan. 16, 1934. w KEMPF 1,944,086

PULVERIZED FUEL FURNACE Filed NOV. 13, 1930 Patented Jan. 16, 1934 1UNITED STATES PATENT OFFICE PULVERIZED FUEL FURNACE Willy Kempf, Cassel,Germany, assignor to Stug Kohlenstaubfeuerung Patentverwertung G. in. b.H., Cassel, Germany Application November 13, 1930, Serial No. 495,491,and in Germany December 13, 1929 3 Claims. (Cl. 11028) The inventionrelates to pulverized fuel furrection so as to uniformly spread in thecombusnaces, more particularly on locomotives, and has tion chamber. forits object an improved arrangement of the The construction according tothe invention is ignition space of such furnaces. Well suited for mainand auxiliary burners as 5 With pulverized fuel furnaces, moreparticuwell as for square locomotive fireboxes and for larly whennon-gassing coal is used, special forelgfiilestwith plain or corrugatedfl ieisf. (if course, chambers are arranged in front of the proper e eails of cons ruc ion may er rom t e combustion space, in order toobtainwith cerembodiment illustrated in the drawing. tainty an ignition at thecorrect time of the fuel- What I claim as my invention is:

to air mixture by preheating it. With the known 1. In a pulverized fuelfurnace, more particuarrangement of this type which have a comparalarlyfor locomotives, a combustion chamber, a tively great structural length,the disposition of common coal-dust and air supply conduit, a rose thefore-chamber on a locomotive is very diffiburner plate in said conduitintermediate the cult, due to the very limited space. Now the subendsthereof, and an ignition chamber arranged ject of the invention is anarrangement of the between said rose burner plate and saidcombusfore-chamber which is remarkable for a simple tion chamber, saidignition chamber being prostructure and enables easy disassembling ofthe vided with a lining which forms a passage tapered fore-chamber fromthe proper fire chamber and in the direction of flow therethroughtowards said satisfactory utilisation of the latter for the pathcombustion chamber to a constriction, the inner of the flame, this beingof importance especially wall of said passage formed by said liningbeing for locomotive fireboxes which are small and adapted to radiateits heat back to said rose subjected to high load. These objects areobburner plate and to heat the mixture up to ignitained by a bodilycombination of the ignition tion temperature. chamber with the mixturesupply conduit. 2. In a pulverized fuel furnace, more particu- Thedrawing illustrates an embodiment of the larly for locomotives, acombustion chamber, a 8 invention by way of example and shows the partscommon coal-dust and air supply conduit, a rosein consideration in avertical section. plate in said conduit intermediate the ends In thisembodiment a common coal-dust and thereof, and an ignition chamberarranged beair supply conduit (1 of a pulverized fuel furnace tween saidrose-plate and said combustion chamfor locomotives is detachably mountedon aboiler ber, said ignition chamber being provided with Z, in theinterior of which is provided a coma lining which forms a passagetapered in the bustion chamber 1'. In the conduit a is arrangeddirection of flow therethrough towards said coma burner plate in form ofa rose plate 12 Within bustion chamber to a constriction, the inner wallthe conduit a is situated between this rose plate of said passage formedby said lining being 35 b and the combustion chamber 2' an ignitionadapted to radiate its heat back to said rosechamber, designatedgenerally by Z This champla e and to heat the mixture up to ignitiontember is rovided with a lining d which forms a p rature.

p g e tapered in the directi n of flow, 3. In a pulverized fuel furnace,more particutherethrough to a constriction 1 Where t joins larly forlocomotives, a combustion chamber, a

s 1 which is flared from t wnstriccommon coal-dust and air supplyconduit, a

: 5? ifizfi the chamber L In this way a rose-plate in said conduitintermediate the ends space e of frusto-conical shape is formed. Uponthereof a an ignition h r arrangedremoval of the conduit a from theboiler Z, the tween e i i f' and Sam f i a nning all is likewiseWithdrawn be? said ighnition chamber being provided with The fuel-airmixture streaming through the p W 10h folms passag tapered. m the 1 t dth b Stion chamber i is direction of flow therethrough towards said com-(War S 6 bustion chamber to a constriction where it joins fm i by roseplate b numerous. i a passage which is flared from said constrictionmdwldual Jets- The configuratlon of the E111 towards the combustionchamber, the inner wall 59 tion space Z causes an abundant heating ofthe of said firstmamed passage formed by said lining mixture up igmtlontemperature, as the 9 being adapted to radiate its heat back to saidpering Portion 61 0f the Space 11 Causes a radlarose-plate and to heatthe mixture up to ignition tion of the heat back to the rose plate In.The temperature conical enlargement g behind the constriction WILLYKEMPF,

55 f serves to guide the igniting mixture in a di-

